| ≥1 piece |
|
Assay
|
≥95%
|
|
Loss on ignition
|
≤2%
|
|
Water insoluble matter
|
≤2%
|
|
As
|
≤1ppm
|
|
Pb
|
≤1ppm
|
|
heavy metals
|
≤10ppm
|